U.S. patent application number 14/817609 was filed with the patent office on 2015-11-26 for carrier indication method, user equipment, and base station.
This patent application is currently assigned to HUAWEI TECHNOLOGIES CO., LTD.. The applicant listed for this patent is HUAWEI TECHNOLOGIES CO., LTD.. Invention is credited to Yongxia LYU, Wen ZHANG.
Application Number | 20150341915 14/817609 |
Document ID | / |
Family ID | 51299150 |
Filed Date | 2015-11-26 |
United States Patent
Application |
20150341915 |
Kind Code |
A1 |
LYU; Yongxia ; et
al. |
November 26, 2015 |
CARRIER INDICATION METHOD, USER EQUIPMENT, AND BASE STATION
Abstract
This application discloses a carrier indication method, user
equipment, and a base station. The method includes: receiving, by
user equipment, first information sent by a base station; if the
user equipment is capable of transmitting uplink data and downlink
data on a carrier, determining, by the user equipment according to
the first information, a carrier used for transmitting first-type
information; and transmitting, by the user equipment, the
first-type information on the determined carrier, where the
first-type information includes at least one of the following:
uplink data, downlink data, and scheduling information. In this
application, user equipment determines, according to first
information sent by a base station, a carrier used for transmitting
information, and therefore, can normally transmit information.
Inventors: |
LYU; Yongxia; (Beijing,
CN) ; ZHANG; Wen; (Shenzhen, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HUAWEI TECHNOLOGIES CO., LTD. |
Shenzhen |
|
CN |
|
|
Assignee: |
HUAWEI TECHNOLOGIES CO.,
LTD.
Shenzhen
CN
|
Family ID: |
51299150 |
Appl. No.: |
14/817609 |
Filed: |
August 4, 2015 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
PCT/CN2013/071382 |
Feb 5, 2013 |
|
|
|
14817609 |
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Current U.S.
Class: |
370/277 |
Current CPC
Class: |
H04W 72/042 20130101;
H04L 5/0044 20130101; H04L 5/0007 20130101; H04W 72/04 20130101;
H04L 5/0092 20130101; H04W 72/1289 20130101; H04L 5/0053 20130101;
H04W 72/0453 20130101; H04L 5/14 20130101; H04W 16/10 20130101;
H04L 5/1469 20130101 |
International
Class: |
H04W 72/04 20060101
H04W072/04; H04L 5/00 20060101 H04L005/00; H04L 5/14 20060101
H04L005/14 |
Claims
1. A carrier indication method, comprising: in a case in which user
equipment is capable of transmitting uplink data and downlink data
on a carrier, determining, by a base station, a carrier used for
transmitting first-type information by the user equipment, wherein
the first-type information comprises at least one of the following:
uplink data, downlink data, and scheduling information; sending, by
the base station, first information to the user equipment, wherein
there is a correspondence between the first information and the
carrier used for transmitting the first-type information; and
transmitting, by the base station, the first-type information on
the carrier.
2. The method according to claim 1, wherein that there is a
correspondence between the first information and the carrier used
for transmitting the first-type information comprises that: if the
first information belongs to a first predetermined set, the carrier
used for transmitting the first-type information is a first
carrier; or if the first information belongs to a second
predetermined set, the carrier used for transmitting the first-type
information is a second carrier.
3. The method according to claim 1, wherein that there is a
correspondence between the first information and the carrier used
for transmitting the first-type information comprises that: the
first information corresponds to a subframe pattern; and the
subframe pattern corresponds to a carrier on which the first-type
information is transmitted in a subframe.
4. The method according to claim 1, wherein the first information
comprises one of the following: a predetermined value and user
equipment-specific information.
5. The method according to claim 4, wherein the user
equipment-specific information comprises one of the following: a
cell radio network temporary identifier C-RNTI and a temporary cell
radio network temporary identifier TC-RNTI that correspond to the
user equipment.
6. User equipment, comprising: a transceiver, configured to receive
first information sent by a base station; and a processor,
configured to: in a case in which the user equipment is capable of
transmitting uplink data and downlink data on a carrier, determine,
according to the first information, a carrier used for transmitting
first-type information, wherein the transceiver is further
configured to transmit the first-type information on the determined
carrier, wherein the first-type information comprises at least one
of the following: uplink data, downlink data, and scheduling
information.
7. The user equipment according to claim 6, wherein the processor
is configured to determine, in the following manner according to
the first information, the carrier used for transmitting the
first-type information: determining, by the processor according to
a correspondence between the first information and the carrier used
for transmitting the first-type information, the carrier used for
transmitting the first-type information.
8. The user equipment according to claim 7, wherein the processor
is configured to determine, in the following manner according to
the correspondence between the first information and the carrier
used for transmitting the first-type information, the carrier used
for transmitting the first-type information: determining, by the
processor, whether the first information belongs to a first
predetermined set or a second predetermined set; and in a case in
which it is determined that the first information belongs to the
first predetermined set, determining, by the processor, to transmit
the first-type information on a first carrier; or in a case in
which it is determined that the first information belongs to the
second predetermined set, determining, by the processor, to
transmit the first-type information on a second carrier.
9. The user equipment according to claim 7, wherein the processor
is configured to determine, in the following manner according to
the correspondence between the first information and the carrier
used for transmitting the first-type information, the carrier used
for transmitting the first-type information: determining, by the
processor according to the first information, a subframe pattern
corresponding to the first information; and determining, by the
processor according to the subframe pattern, a carrier on which the
first-type information is transmitted in each subframe.
10. The user equipment according to claim 6, wherein the first
information comprises one of the following: a predetermined value
and user equipment-specific information.
11. The user equipment according to claim 10, wherein the user
equipment-specific information comprises one of the following: a
cell radio network temporary identifier C-RNTI and a temporary cell
radio network temporary identifier TC-RNTI that correspond to the
user equipment.
12. The user equipment according to claim 6, wherein the
transceiver is configured to transmit the first-type information on
the determined carrier in the following manner: receiving, by the
transceiver, downlink control information DCI on the determined
carrier; and the processor is further configured to: after the
transceiver receives the DCI on the determined carrier, determine,
according to the DCI, a carrier used for transmitting second-type
information, wherein the second-type information comprises: uplink
data and/or downlink data.
13. The user equipment according to claim 12, wherein the processor
is configured to determine, in the following manner according to
the DCI, the carrier used for transmitting the second-type
information: the DCI comprising: first indication information used
for indicating that uplink transmission or downlink transmission is
to be performed, and second indication information used for
indicating a carrier, and determining, by the processor according
to the first indication information and the second indication
information, the carrier used for transmitting the second-type
information.
14. A base station, comprising: a processor, configured to: in a
case in which user equipment is capable of transmitting uplink data
and downlink data on a carrier, determine a carrier used for
transmitting first-type information by the user equipment, wherein
the first-type information comprises at least one of the following:
uplink data, downlink data, and scheduling information; and a
transceiver, configured to send first information to the user
equipment, wherein there is a correspondence between the first
information and the carrier used for transmitting the first-type
information, wherein the transceiver is further configured to
transmit the first-type information on the carrier.
15. The base station according to claim 14, wherein that there is a
correspondence between the first information and the carrier used
for transmitting the first-type information comprises that: if the
first information belongs to a first predetermined set, the carrier
used for transmitting the first-type information is a first
carrier; or if the first information belongs to a second
predetermined set, the carrier used for transmitting the first-type
information is a second carrier.
16. The base station according to claim 14, wherein that there is a
correspondence between the first information and the carrier used
for transmitting the first-type information comprises that: the
first information corresponds to a subframe pattern; and the
subframe pattern corresponds to a carrier on which the first-type
information is transmitted in a subframe.
17. The base station according to claim 14, wherein the first
information comprises one of the following: a predetermined value
and user equipment-specific information.
18. The base station according to claim 17, wherein the user
equipment-specific information comprises one of the following: a
cell radio network temporary identifier C-RNTI and a temporary cell
radio network temporary identifier TC-RNTI that correspond to the
user equipment.
19. The base station according to claim 14, wherein: the
transceiver is configured to transmit the first-type information on
the carrier in the following manner: sending downlink control
information DCI to the user equipment on the carrier determined by
the base station and used for transmitting the first-type
information, wherein the DCI is used by the user equipment to
determine, according to the DCI, a carrier used for transmitting
second-type information, and the second-type information comprises:
uplink data and/or downlink data.
20. The base station according to claim 19, wherein the DCI
comprises: first indication information used for indicating that
uplink transmission or downlink transmission is to be performed,
and second indication information used for indicating a carrier.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of International
Application No. PCT/CN2013/071382, filed on Feb. 5, 2013, which is
hereby incorporated by reference in its entirety.
TECHNICAL FIELD
[0002] This application relates to the field of communications, and
in particular, to a carrier indication method, user equipment, and
a base station.
BACKGROUND
[0003] With the popularity of smartphones and rapid development of
high-speed mobile Internet technologies, communications systems,
such as International Mobile Telecommunications 2000 (3G), a
Worldwide Interoperability for Microwave Access system (WiMAX for
short), a Long Term Evolution system (LTE for short), and a Long
Term Evolution Advanced system (LTE-A for short), which are
involved in various wireless broadband access technologies, keep
emerging. In the foregoing wireless communications system, on same
time and frequency resources, data can only be received or sent
between a base station and user equipment, but data cannot be
received and sent simultaneously between a base station and user
equipment. For example, in a Frequency Division Duplex (FDD for
short) system, a base station sends data to a user and receives
data from the user separately by using different frequency
resources; and in a Time Division Duplex (TDD for short) system, a
base station sends data to a user and receives data from the user
separately by using different time resources.
[0004] In evolution of the wireless broadband access technologies,
in a case of considering neither a higher-order modulation
technology nor configuration of more transmit and receive antennas,
usually, a greater communication bandwidth is used to obtain a
higher peak rate, for example, an LTE system supports a maximum
system bandwidth of 20 MHz, while an LTE-A system can support a
maximum system bandwidth of 100 MHz by using a carrier aggregation
technology. However, wireless spectrum resources are very rare and
expensive, causing that the limited spectrum resources become a
barrier to further improvement of a system capacity.
[0005] To improve a utilization rate of spectrum resources, a new
full-duplex communications technology is proposed. A specific
technical means is used to reduce interference caused when a
communications device receives and transmits signals
simultaneously, so that the communications device can implement
bidirectional transmission of communication data, where the
communications device includes a base station, user equipment (UE
for short), and the like, and the technical means may be at least
one of the following: antennas are appropriately arranged on a
device to enable signals from multiple transmit antennas to just
cancel out each other at a receive antenna, or a known signal
transmitted by a transmit circuit is used in a receive circuit to
perform interference cancellation. Notably, the new full-duplex
communication herein refers to that: a base station and UE can
perform bidirectional data transmission on a same time-frequency
resource. For example, in an LTE system, if a base station is
full-duplex, two UEs that are sufficiently far away from each other
and that are managed by the eNB can receive and transmit data
and/or signaling on a same time-frequency resource; in this way, a
spectrum utilization rate can be improved, where the base station
may be an evolved NodeB, which is briefly referred to as an eNodeB
or an eNB.
[0006] In an FDD system, a full-duplex eNB is used and can support
transmission of uplink data and downlink data on a same carrier,
for example, downlink data and uplink data are transmitted on an
uplink carrier, and uplink data and downlink data are transmitted
on a downlink carrier.
[0007] However, if UE managed by a full-duplex eNB also has a
duplex capability, the UE does not know a carrier that transmits
uplink and downlink data or signaling, and therefore, cannot
effectively transmit information.
SUMMARY
[0008] This application provides a carrier indication method, user
equipment, and a base station, so as to resolve a problem in
related technologies that, if both UE and a base station have a
duplex capability, the UE cannot effectively transmit
information.
[0009] According to a first aspect, an embodiment of the present
invention provides a carrier indication method, including:
receiving, by user equipment, first information sent by a base
station; if the user equipment is capable of transmitting uplink
data and downlink data on a carrier, determining, by the user
equipment according to the first information, a carrier used for
transmitting first-type information; and transmitting, by the user
equipment, the first-type information on the determined carrier,
where the first-type information includes at least one of the
following: uplink data, downlink data, and scheduling
information.
[0010] In a first possible implementation manner of the first
aspect, the determining, by the user equipment according to the
first information, a carrier used for transmitting first-type
information includes: determining, by the user equipment according
to a correspondence between the first information and the carrier
used for transmitting the first-type information, the carrier used
for transmitting the first-type information.
[0011] With reference to the foregoing possible implementation
manner, in a second possible implementation manner of the first
aspect, the determining, by the user equipment according to a
correspondence between the first information and the carrier used
for transmitting the first-type information, the carrier used for
transmitting the first-type information includes: determining, by
the user equipment, whether the first information belongs to a
first predetermined set or a second predetermined set; and if the
first information belongs to the first predetermined set,
determining, by the user equipment, to transmit the first-type
information on a first carrier; or if the first information belongs
to the second predetermined set, determining, by the user
equipment, to transmit the first-type information on a second
carrier.
[0012] With reference to either of the foregoing possible
implementation manners, in a third possible implementation manner
of the first aspect, the determining, by the user equipment
according to a correspondence between the first information and the
carrier used for transmitting the first-type information, the
carrier used for transmitting the first-type information includes:
determining, by the user equipment according to the first
information, a subframe pattern corresponding to the first
information; and determining, by the user equipment according to
the subframe pattern, a carrier on which the first-type information
is transmitted in each subframe.
[0013] With reference to any one of the foregoing possible
implementation manners, in a fourth possible implementation manner
of the first aspect, the first information includes the subframe
pattern.
[0014] With reference to any one of the foregoing possible
implementation manners, in a fifth possible implementation manner
of the first aspect, the first information includes one of the
following: a predetermined value and user equipment-specific
information.
[0015] With reference to any one of the foregoing possible
implementation manners, in a sixth possible implementation manner
of the first aspect, the user equipment-specific information
includes one of the following: a cell radio network temporary
identifier C-RNTI and a temporary cell radio network temporary
identifier TC-RNTI that correspond to the user equipment.
[0016] With reference to any one of the foregoing possible
implementation manners, in a seventh possible implementation manner
of the first aspect, the determining, by the user equipment
according to a correspondence between the first information and the
carrier used for transmitting the first-type information, the
carrier used for transmitting the first-type information includes:
the first information being corresponding to at least one of the
following: a subframe pattern of a first carrier and a subframe
pattern of a second carrier; and determining, by the user equipment
according to the subframe pattern of the first carrier and/or the
subframe pattern of the second carrier, a carrier on which the
first-type information is transmitted in each subframe.
[0017] With reference to any one of the foregoing possible
implementation manners, in an eighth possible implementation manner
of the first aspect, the transmitting, by the user equipment, the
first-type information on the determined carrier includes:
receiving, by the user equipment, downlink control information DCI
on the determined carrier; and after the user equipment receives
the DCI on the determined carrier, determining, by the user
equipment according to the DCI, a carrier used for transmitting
second-type information, where the second-type information
includes: uplink data and/or downlink data.
[0018] With reference to any one of the foregoing possible
implementation manners, in a ninth possible implementation manner
of the first aspect, the determining, by the user equipment
according to the DCI, a carrier used for transmitting second-type
information includes: the DCI including: first indication
information used for indicating that uplink transmission or
downlink transmission is to be performed, and second indication
information used for indicating a carrier, and determining, by the
user equipment according to the first indication information and
the second indication information, the carrier used for
transmitting the second-type information.
[0019] With reference to any one of the foregoing possible
implementation manners, in a tenth possible implementation manner
of the first aspect, the determining, by the user equipment
according to the DCI, a carrier used for transmitting second-type
information includes: descrambling, by the user equipment, the DCI
by using descrambling information in a descrambling information
set; and if the DCI is successfully descrambled by using first
descrambling information, determining, by the user equipment, to
transmit the second-type information on the first carrier; or if
the DCI is successfully descrambled by using second descrambling
information, determining, by the user equipment, to transmit the
second-type information on the second carrier.
[0020] With reference to any one of the foregoing possible
implementation manners, in an eleventh possible implementation
manner of the first aspect, the descrambling information set
includes: at least two predetermined sequences or at least two
different C-RNTIs.
[0021] With reference to any one of the foregoing possible
implementation manners, in a twelfth possible implementation manner
of the first aspect, if the descrambling information set includes
at least two different C-RNTIs, before the descrambling the DCI,
the method further includes: receiving, by the user equipment, the
at least two different C-RNTIs allocated by the base station.
[0022] With reference to any one of the foregoing possible
implementation manners, in a thirteenth possible implementation
manner of the first aspect, the determining, by the user equipment
according to the DCI, a carrier used for transmitting second-type
information includes: determining, by the user equipment according
to a correspondence between a number of a CCE in which the DCI is
located and the carrier used for transmitting the second-type
information, the carrier used for transmitting the second-type
information.
[0023] With reference to any one of the foregoing possible
implementation manners, in a fourteenth possible implementation
manner of the first aspect, the determining, by the user equipment
according to a correspondence between a number of a CCE in which
the DCI is located and the carrier used for transmitting the
second-type information, the carrier used for transmitting the
second-type information includes: if the number of the CCE in which
the DCI is located belongs to a first number set, determining, by
the user equipment, to transmit the second-type information on the
first carrier; or if the number of the CCE in which the DCI is
located belongs to a second number set, determining, by the user
equipment, to transmit the second-type information on the second
carrier.
[0024] With reference to any one of the foregoing possible
implementation manners, in a fifteenth possible implementation
manner of the first aspect, before the receiving, by user
equipment, first information sent by a base station, the method
further includes: receiving, by the user equipment, a message that
is sent by the base station and that is used for indicating that
the base station has a full-duplex capability; and sending, by the
user equipment, a first message to the base station, where the
first message is used for indicating that the user equipment can
receive uplink data and downlink data on a carrier.
[0025] According to a second aspect, a carrier indication method is
provided, including: in a case in which user equipment is capable
of transmitting uplink data and downlink data on a carrier,
determining, by a base station, a carrier used for transmitting
first-type information by the user equipment, where the first-type
information includes at least one of the following: uplink data,
downlink data, and scheduling information; sending, by the base
station, first information to the user equipment, where there is a
correspondence between the first information and the carrier used
for transmitting the first-type information; and transmitting, by
the base station, the first-type information on the carrier.
[0026] In a first possible implementation manner of the second
aspect, that there is a correspondence between the first
information and the carrier used for transmitting the first-type
information includes that: if the first information belongs to a
first predetermined set, the carrier used for transmitting the
first-type information is a first carrier; or if the first
information belongs to a second predetermined set, the carrier used
for transmitting the first-type information is a second
carrier.
[0027] With reference to the foregoing possible implementation
manner, in a second possible implementation manner of the second
aspect, that there is a correspondence between the first
information and the carrier used for transmitting the first-type
information includes that: the first information corresponds to a
subframe pattern; and the subframe pattern corresponds to a carrier
on which the first-type information is transmitted in a
subframe.
[0028] With reference to either of the foregoing possible
implementation manners, in a third possible implementation manner
of the second aspect, the first information includes the subframe
pattern.
[0029] With reference to any one of the foregoing possible
implementation manners, in a fourth possible implementation manner
of the second aspect, the first information includes one of the
following: a predetermined value and user equipment-specific
information.
[0030] With reference to any one of the foregoing possible
implementation manners, in a fifth possible implementation manner
of the second aspect, the user equipment-specific information
includes one of the following: a cell radio network temporary
identifier C-RNTI and a temporary cell radio network temporary
identifier TC-RNTI that correspond to the user equipment.
[0031] With reference to any one of the foregoing possible
implementation manners, in a sixth possible implementation manner
of the second aspect, that there is a correspondence between the
first information and the carrier used for transmitting the
first-type information includes that: the first information
corresponds to at least one of the following: a subframe pattern of
a first carrier and a subframe pattern of a second carrier; and the
subframe pattern of the first carrier and/or the subframe pattern
of the second carrier corresponds to a carrier on which the
first-type information is transmitted in a subframe.
[0032] With reference to any one of the foregoing possible
implementation manners, in a seventh possible implementation manner
of the second aspect, the transmitting, by the base station, the
first-type information on the carrier includes: sending, by the
base station, downlink control information DCI to the user
equipment on the carrier determined by the base station and used
for transmitting the first-type information, where the DCI is used
by the user equipment to determine, according to the DCI, a carrier
used for transmitting second-type information, and the second-type
information includes: uplink data and/or downlink data.
[0033] With reference to any one of the foregoing possible
implementation manners, in an eighth possible implementation manner
of the second aspect, the DCI includes: first indication
information used for indicating that uplink transmission or
downlink transmission is to be performed, and second indication
information used for indicating a carrier.
[0034] With reference to any one of the foregoing possible
implementation manners, in a ninth possible implementation manner
of the second aspect, before the sending, by the base station,
downlink control information DCI to the user equipment on the
carrier determined by the base station and used for transmitting
the first-type information, the method further includes:
scrambling, by the base station, the DCI by using scrambling
information in a scrambling information set, where if the
scrambling information is first scrambling information, the carrier
used for transmitting the second-type information is a first
carrier; or if the scrambling information is second scrambling
information, the carrier used for transmitting the second-type
information is a second carrier.
[0035] With reference to any one of the foregoing possible
implementation manners, in a tenth possible implementation manner
of the second aspect, the scrambling information set includes: at
least two predetermined sequences or at least two different
C-RNTIs.
[0036] With reference to any one of the foregoing possible
implementation manners, in an eleventh possible implementation
manner of the second aspect, if the scrambling information set
includes at least two different C-RNTIs, the method further
includes: sending, by the base station, the at least two different
C-RNTIs to the user equipment.
[0037] With reference to any one of the foregoing possible
implementation manners, in a twelfth possible implementation manner
of the second aspect, there is a correspondence between a number of
a CCE in which the DCI is located and the carrier used for
transmitting the second-type information.
[0038] With reference to any one of the foregoing possible
implementation manners, in a thirteenth possible implementation
manner of the second aspect, that there is a correspondence between
a number of a CCE in which the DCI is located and the carrier used
for transmitting the second-type information includes that: if the
number of the CCE in which the DCI is located belongs to a first
number set, the carrier used for transmitting the second-type
information is a first carrier; or if the number of the CCE in
which the DCI is located belongs to a second number set, the
carrier used for transmitting the second-type information is a
second carrier.
[0039] With reference to any one of the foregoing possible
implementation manners, in a fourteenth possible implementation
manner of the second aspect, before the sending, by the base
station, first information to the user equipment, the method
further includes: sending, by the base station to the user
equipment, a message used for indicating that the base station has
a full-duplex capability; and receiving, by the base station, a
first message sent by the user equipment, where the first message
is used for indicating that the user equipment can receive uplink
data and downlink data on a carrier.
[0040] According to a third aspect, user equipment is provided,
including: a transceiver unit, configured to receive first
information sent by a base station; and a processing unit,
configured to: in a case in which the user equipment is capable of
transmitting uplink data and downlink data on a carrier, determine,
according to the first information, a carrier used for transmitting
first-type information, where the transceiver unit is further
configured to transmit the first-type information on the determined
carrier, where the first-type information includes at least one of
the following: uplink data, downlink data, and scheduling
information.
[0041] In a first possible implementation manner of the third
aspect, the processing unit is configured to determine, in the
following manner according to the first information, the carrier
used for transmitting the first-type information: determining, by
the processing unit according to a correspondence between the first
information and the carrier used for transmitting the first-type
information, the carrier used for transmitting the first-type
information.
[0042] With reference to the foregoing possible implementation
manner, in a second possible implementation manner of the third
aspect, the processing unit is configured to determine, in the
following manner according to the correspondence between the first
information and the carrier used for transmitting the first-type
information, the carrier used for transmitting the first-type
information: determining, by the processing unit, whether the first
information belongs to a first predetermined set or a second
predetermined set; and in a case in which it is determined that the
first information belongs to the first predetermined set,
determining, by the processing unit, to transmit the first-type
information on a first carrier; or in a case in which it is
determined that the first information belongs to the second
predetermined set, determining, by the processing unit, to transmit
the first-type information on a second carrier.
[0043] With reference to either of the foregoing possible
implementation manners, in a third possible implementation manner
of the third aspect, the processing unit is configured to
determine, in the following manner according to the correspondence
between the first information and the carrier used for transmitting
the first-type information, the carrier used for transmitting the
first-type information: determining, by the processing unit
according to the first information, a subframe pattern
corresponding to the first information; and determining, by the
processing unit according to the subframe pattern, a carrier on
which the first-type information is transmitted in each
subframe.
[0044] With reference to any one of the foregoing possible
implementation manners, in a fourth possible implementation manner
of the third aspect, the first information includes the subframe
pattern.
[0045] With reference to any one of the foregoing possible
implementation manners, in a fifth possible implementation manner
of the third aspect, the first information includes one of the
following: a predetermined value and user equipment-specific
information.
[0046] With reference to any one of the foregoing possible
implementation manners, in a sixth possible implementation manner
of the third aspect, the user equipment-specific information
includes one of the following: a cell radio network temporary
identifier C-RNTI and a temporary cell radio network temporary
identifier TC-RNTI that correspond to the user equipment.
[0047] With reference to any one of the foregoing possible
implementation manners, in a seventh possible implementation manner
of the third aspect, the processing unit is configured to
determine, in the following manner according to the correspondence
between the first information and the carrier used for transmitting
the first-type information, the carrier used for transmitting the
first-type information: the first information being corresponding
to at least one of the following: a subframe pattern of a first
carrier and a subframe pattern of a second carrier; and
determining, by the processing unit according to the subframe
pattern of the first carrier and/or the subframe pattern of the
second carrier, a carrier on which the first-type information is
transmitted in each subframe.
[0048] With reference to any one of the foregoing possible
implementation manners, in an eighth possible implementation manner
of the third aspect, the transceiver unit is configured to transmit
the first-type information on the determined carrier in the
following manner: receiving, by the transceiver unit, downlink
control information DCI on the determined carrier; and the
processing unit is further configured to: after the transceiver
unit receives the DCI on the determined carrier, determine,
according to the DCI, a carrier used for transmitting second-type
information, where the second-type information includes: uplink
data and/or downlink data.
[0049] With reference to any one of the foregoing possible
implementation manners, in a ninth possible implementation manner
of the third aspect, the processing unit is configured to
determine, in the following manner according to the DCI, the
carrier used for transmitting the second-type information: the DCI
including: first indication information used for indicating that
uplink transmission or downlink transmission is to be performed,
and second indication information used for indicating a carrier,
and determining, by the processing unit according to the first
indication information and the second indication information, the
carrier used for transmitting the second-type information.
[0050] With reference to any one of the foregoing possible
implementation manners, in a tenth possible implementation manner
of the third aspect, the processing unit is configured to
determine, in the following manner according to the DCI, the
carrier used for transmitting the second-type information:
descrambling, by the processing unit, the DCI by using descrambling
information in a descrambling information set; and in a case in
which the DCI is successfully descrambled by using first
descrambling information, determining, by the processing unit, to
transmit the second-type information on the first carrier; or in a
case in which the DCI is successfully descrambled by using second
descrambling information, determining, by the processing unit, to
transmit the second-type information on the second carrier.
[0051] With reference to any one of the foregoing possible
implementation manners, in an eleventh possible implementation
manner of the third aspect, the descrambling information set
includes: at least two predetermined sequences or at least two
different C-RNTIs.
[0052] With reference to any one of the foregoing possible
implementation manners, in a twelfth possible implementation manner
of the third aspect, the transceiver unit is further configured to:
in a case in which the descrambling information set includes at
least two different C-RNTIs, before the DCI is descrambled, receive
the at least two different C-RNTIs allocated by the base
station.
[0053] With reference to any one of the foregoing possible
implementation manners, in a thirteenth possible implementation
manner of the third aspect, the processing unit is configured to
determine, in the following manner according to the DCI, the
carrier used for transmitting the second-type information:
determining, by the processing unit according to a correspondence
between a number of a CCE in which the DCI is located and the
carrier used for transmitting the second-type information, the
carrier used for transmitting the second-type information.
[0054] With reference to any one of the foregoing possible
implementation manners, in a fourteenth possible implementation
manner of the third aspect, the processing unit is configured to
determine, in the following manner according to the correspondence
between the number of the CCE in which the DCI is located and the
carrier used for transmitting the second-type information, the
carrier used for transmitting the second-type information: in a
case in which the number of the CCE in which the DCI is located
belongs to a first number set, determining, by the processing unit,
to transmit the second-type information on the first carrier; or in
a case in which the number of the CCE in which the DCI is located
belongs to a second number set, determining, by the processing
unit, to transmit the second-type information on the second
carrier.
[0055] With reference to any one of the foregoing possible
implementation manners, in a fifteenth possible implementation
manner of the third aspect, the transceiver unit is further
configured to: before the user equipment receives the first
information sent by the base station, receive a message that is
sent by the base station and that is used for indicating that the
base station has a full-duplex capability; and send a first message
to the base station, where the first message is used for indicating
that the user equipment can receive uplink data and downlink data
on a carrier.
[0056] According to a fourth aspect, a base station is provided,
including: a processing unit, configured to: in a case in which
user equipment is capable of transmitting uplink data and downlink
data on a carrier, determine a carrier used for transmitting
first-type information by the user equipment, where the first-type
information includes at least one of the following: uplink data,
downlink data, and scheduling information; and a transceiver unit,
configured to send first information to the user equipment, where
there is a correspondence between the first information and the
carrier used for transmitting the first-type information, where the
transceiver unit is further configured to transmit the first-type
information on the carrier.
[0057] In a first possible implementation manner of the fourth
aspect, that there is a correspondence between the first
information and the carrier used for transmitting the first-type
information includes that: if the first information belongs to a
first predetermined set, the carrier used for transmitting the
first-type information is a first carrier; or if the first
information belongs to a second predetermined set, the carrier used
for transmitting the first-type information is a second
carrier.
[0058] With reference to the foregoing possible implementation
manner, in a second possible implementation manner of the fourth
aspect, that there is a correspondence between the first
information and the carrier used for transmitting the first-type
information includes that: the first information corresponds to a
subframe pattern; and the subframe pattern corresponds to a carrier
on which the first-type information is transmitted in a
subframe.
[0059] With reference to either of the foregoing possible
implementation manners, in a third possible implementation manner
of the fourth aspect, the first information includes the subframe
pattern.
[0060] With reference to any one of the foregoing possible
implementation manners, in a fourth possible implementation manner
of the fourth aspect, the first information includes one of the
following: a predetermined value and user equipment-specific
information.
[0061] With reference to any one of the foregoing possible
implementation manners, in a fifth possible implementation manner
of the fourth aspect, the user equipment-specific information
includes one of the following: a cell radio network temporary
identifier C-RNTI and a temporary cell radio network temporary
identifier TC-RNTI that correspond to the user equipment.
[0062] With reference to any one of the foregoing possible
implementation manners, in a sixth possible implementation manner
of the fourth aspect, that there is a correspondence between the
first information and the carrier used for transmitting the
first-type information includes that: the first information
corresponds to at least one of the following: a subframe pattern of
a first carrier and a subframe pattern of a second carrier; and the
subframe pattern of the first carrier and/or the subframe pattern
of the second carrier corresponds to a carrier on which the
first-type information is transmitted in a subframe.
[0063] With reference to any one of the foregoing possible
implementation manners, in a seventh possible implementation manner
of the fourth aspect, the transceiver unit is configured to
transmit the first-type information on the carrier in the following
manner: sending downlink control information DCI to the user
equipment on the carrier determined by the base station and used
for transmitting the first-type information, where the DCI is used
by the user equipment to determine, according to the DCI, a carrier
used for transmitting second-type information, and the second-type
information includes: uplink data and/or downlink data.
[0064] With reference to any one of the foregoing possible
implementation manners, in an eighth possible implementation manner
of the fourth aspect, the DCI includes: first indication
information used for indicating that uplink transmission or
downlink transmission is to be performed, and second indication
information used for indicating a carrier.
[0065] With reference to any one of the foregoing possible
implementation manners, in a ninth possible implementation manner
of the fourth aspect, the processing unit is further configured to:
before the transceiver unit sends the downlink control information
DCI to the user equipment, scramble the DCI by using scrambling
information in a scrambling information set, where if the
scrambling information is first scrambling information, the carrier
used for transmitting the second-type information is a first
carrier; or if the scrambling information is second scrambling
information, the carrier used for transmitting the second-type
information is a second carrier.
[0066] With reference to any one of the foregoing possible
implementation manners, in a tenth possible implementation manner
of the fourth aspect, the scrambling information set includes: at
least two predetermined sequences or at least two different
C-RNTIs.
[0067] With reference to any one of the foregoing possible
implementation manners, in an eleventh possible implementation
manner of the fourth aspect, if the scrambling information set
includes at least two different C-RNTIs, the transceiver unit is
further configured to send the at least two different C-RNTIs to
the user equipment.
[0068] With reference to any one of the foregoing possible
implementation manners, in a twelfth possible implementation manner
of the fourth aspect, there is a correspondence between a number of
a CCE in which the DCI is located and the carrier used for
transmitting the second-type information.
[0069] With reference to any one of the foregoing possible
implementation manners, in a thirteenth possible implementation
manner of the fourth aspect, that there is a correspondence between
a number of a CCE in which the DCI is located and the carrier used
for transmitting the second-type information includes that: if the
number of the CCE in which the DCI is located belongs to a first
number set, the carrier used for transmitting the second-type
information is a first carrier; or if the number of the CCE in
which the DCI is located belongs to a second number set, the
carrier used for transmitting the second-type information is a
second carrier.
[0070] With reference to any one of the foregoing possible
implementation manners, in a fourteenth possible implementation
manner of the fourth aspect, the transceiver unit is further
configured to: before sending the first information to the user
equipment, send, to the user equipment, a message used for
indicating that the base station has a full-duplex capability; and
receive a first message sent by the user equipment, where the first
message is used for indicating that the user equipment can receive
uplink data and downlink data on a carrier.
[0071] According to a fifth aspect, user equipment is provided,
including: a transceiver, configured to receive first information
sent by a base station; and a processor, configured to: in a case
in which the user equipment is capable of transmitting uplink data
and downlink data on a carrier, determine, according to the first
information, a carrier used for transmitting first-type
information, where the transceiver is further configured to
transmit the first-type information on the determined carrier,
where the first-type information includes at least one of the
following: uplink data, downlink data, and scheduling
information.
[0072] In a first possible implementation manner of the fifth
aspect, the processor is configured to determine, in the following
manner according to the first information, the carrier used for
transmitting the first-type information: determining, by the
processor according to a correspondence between the first
information and the carrier used for transmitting the first-type
information, the carrier used for transmitting the first-type
information.
[0073] With reference to the foregoing possible implementation
manner, in a second possible implementation manner of the fifth
aspect, the processor is configured to determine, in the following
manner according to the correspondence between the first
information and the carrier used for transmitting the first-type
information, the carrier used for transmitting the first-type
information: determining, by the processor, whether the first
information belongs to a first predetermined set or a second
predetermined set; and in a case in which it is determined that the
first information belongs to the first predetermined set,
determining, by the processor, to transmit the first-type
information on a first carrier; or in a case in which it is
determined that the first information belongs to the second
predetermined set, determining, by the processor, to transmit the
first-type information on a second carrier.
[0074] With reference to either of the foregoing possible
implementation manners, in a third possible implementation manner
of the fifth aspect, the processor is configured to determine, in
the following manner according to the correspondence between the
first information and the carrier used for transmitting the
first-type information, the carrier used for transmitting the
first-type information: determining, by the processor according to
the first information, a subframe pattern corresponding to the
first information; and determining, by the processor according to
the subframe pattern, a carrier on which the first-type information
is transmitted in each subframe.
[0075] With reference to any one of the foregoing possible
implementation manners, in a fourth possible implementation manner
of the fifth aspect, the first information includes the subframe
pattern.
[0076] With reference to any one of the foregoing possible
implementation manners, in a fifth possible implementation manner
of the fifth aspect, the first information includes one of the
following: a predetermined value and user equipment-specific
information.
[0077] With reference to any one of the foregoing possible
implementation manners, in a sixth possible implementation manner
of the fifth aspect, the user equipment-specific information
includes one of the following: a cell radio network temporary
identifier C-RNTI and a temporary cell radio network temporary
identifier TC-RNTI that correspond to the user equipment.
[0078] With reference to any one of the foregoing possible
implementation manners, in a seventh possible implementation manner
of the fifth aspect, the processor is configured to determine, in
the following manner according to the correspondence between the
first information and the carrier used for transmitting the
first-type information, the carrier used for transmitting the
first-type information: the first information being corresponding
to at least one of the following: a subframe pattern of a first
carrier and a subframe pattern of a second carrier; and
determining, by the processor according to the subframe pattern of
the first carrier and/or the subframe pattern of the second
carrier, a carrier on which the first-type information is
transmitted in each subframe.
[0079] With reference to any one of the foregoing possible
implementation manners, in an eighth possible implementation manner
of the fifth aspect, the transceiver is configured to transmit the
first-type information on the determined carrier in the following
manner: receiving, by the transceiver, downlink control information
DCI on the determined carrier; and the processor is further
configured to: after the transceiver receives the DCI on the
determined carrier, determine, according to the DCI, a carrier used
for transmitting second-type information, where the second-type
information includes: uplink data and/or downlink data.
[0080] With reference to any one of the foregoing possible
implementation manners, in a ninth possible implementation manner
of the fifth aspect, the processor is configured to determine, in
the following manner according to the DCI, the carrier used for
transmitting the second-type information: the DCI including: first
indication information used for indicating that uplink transmission
or downlink transmission is to be performed, and second indication
information used for indicating a carrier, and determining, by the
processor according to the first indication information and the
second indication information, the carrier used for transmitting
the second-type information.
[0081] With reference to any one of the foregoing possible
implementation manners, in a tenth possible implementation manner
of the fifth aspect, the processor is configured to determine, in
the following manner according to the DCI, the carrier used for
transmitting the second-type information: descrambling, by the
processor, the DCI by using descrambling information in a
descrambling information set; and in a case in which the DCI is
successfully descrambled by using first descrambling information,
determining, by the processor, to transmit the second-type
information on the first carrier; or in a case in which the DCI is
successfully descrambled by using second descrambling information,
determining, by the processor, to transmit the second-type
information on the second carrier.
[0082] With reference to any one of the foregoing possible
implementation manners, in an eleventh possible implementation
manner of the fifth aspect, the descrambling information set
includes: at least two predetermined sequences or at least two
different C-RNTIs.
[0083] With reference to any one of the foregoing possible
implementation manners, in a twelfth possible implementation manner
of the fifth aspect, the transceiver is further configured to: in a
case in which the descrambling information set includes at least
two different C-RNTIs, before the DCI is descrambled, receive the
at least two different C-RNTIs allocated by the base station.
[0084] With reference to any one of the foregoing possible
implementation manners, in a thirteenth possible implementation
manner of the fifth aspect, the processor is configured to
determine, in the following manner according to the DCI, the
carrier used for transmitting the second-type information:
determining, by the processor according to a correspondence between
a number of a CCE in which the DCI is located and the carrier used
for transmitting the second-type information, the carrier used for
transmitting the second-type information.
[0085] With reference to any one of the foregoing possible
implementation manners, in a fourteenth possible implementation
manner of the fifth aspect, the processor is configured to
determine, in the following manner according to the correspondence
between the number of the CCE in which the DCI is located and the
carrier used for transmitting the second-type information, the
carrier used for transmitting the second-type information: in a
case in which the number of the CCE in which the DCI is located
belongs to a first number set, determining, by the processor, to
transmit the second-type information on the first carrier; or in a
case in which the number of the CCE in which the DCI is located
belongs to a second number set, determining, by the processor, to
transmit the second-type information on the second carrier.
[0086] With reference to any one of the foregoing possible
implementation manners, in a fifteenth possible implementation
manner of the fifth aspect, the transceiver is further configured
to: before the user equipment receives the first information sent
by the base station, receive a message that is sent by the base
station and that is used for indicating that the base station has a
full-duplex capability; and send a first message to the base
station, where the first message is used for indicating that the
user equipment can receive uplink data and downlink data on a
carrier.
[0087] According to a sixth aspect, a base station is provided,
including: a processor, configured to: in a case in which user
equipment is capable of transmitting uplink data and downlink data
on a carrier, determine a carrier used for transmitting first-type
information by the user equipment, where the first-type information
includes at least one of the following: uplink data, downlink data,
and scheduling information; and a transceiver, configured to send
first information to the user equipment, where there is a
correspondence between the first information and the carrier used
for transmitting the first-type information, where the transceiver
is further configured to transmit the first-type information on the
carrier.
[0088] In a first possible implementation manner of the sixth
aspect, that there is a correspondence between the first
information and the carrier used for transmitting the first-type
information includes that: if the first information belongs to a
first predetermined set, the carrier used for transmitting the
first-type information is a first carrier; or if the first
information belongs to a second predetermined set, the carrier used
for transmitting the first-type information is a second
carrier.
[0089] With reference to the foregoing possible implementation
manner, in a second possible implementation manner of the sixth
aspect, that there is a correspondence between the first
information and the carrier used for transmitting the first-type
information includes that: the first information corresponds to a
subframe pattern; and the subframe pattern corresponds to a carrier
on which the first-type information is transmitted in a
subframe.
[0090] With reference to either of the foregoing possible
implementation manners, in a third possible implementation manner
of the sixth aspect, the first information includes the subframe
pattern.
[0091] With reference to any one of the foregoing possible
implementation manners, in a fourth possible implementation manner
of the sixth aspect, the first information includes one of the
following: a predetermined value and user equipment-specific
information.
[0092] With reference to any one of the foregoing possible
implementation manners, in a fifth possible implementation manner
of the sixth aspect, the user equipment-specific information
includes one of the following: a cell radio network temporary
identifier C-RNTI and a temporary cell radio network temporary
identifier TC-RNTI that correspond to the user equipment.
[0093] With reference to any one of the foregoing possible
implementation manners, in a sixth possible implementation manner
of the sixth aspect, that there is a correspondence between the
first information and the carrier used for transmitting the
first-type information includes that: the first information
corresponds to at least one of the following: a subframe pattern of
a first carrier and a subframe pattern of a second carrier; and the
subframe pattern of the first carrier and/or the subframe pattern
of the second carrier corresponds to a carrier on which the
first-type information is transmitted in a subframe.
[0094] With reference to any one of the foregoing possible
implementation manners, in a seventh possible implementation manner
of the sixth aspect, the transceiver is configured to transmit the
first-type information on the carrier in the following manner:
sending downlink control information DCI to the user equipment on
the carrier determined by the base station and used for
transmitting the first-type information, where the DCI is used by
the user equipment to determine, according to the DCI, a carrier
used for transmitting second-type information, and the second-type
information includes: uplink data and/or downlink data.
[0095] With reference to any one of the foregoing possible
implementation manners, in an eighth possible implementation manner
of the sixth aspect, the DCI includes: first indication information
used for indicating that uplink transmission or downlink
transmission is to be performed, and second indication information
used for indicating a carrier.
[0096] With reference to any one of the foregoing possible
implementation manners, in a ninth possible implementation manner
of the sixth aspect, the processor is further configured to: before
the transceiver sends the downlink control information DCI to the
user equipment, scramble the DCI by using scrambling information in
a scrambling information set, where if the scrambling information
is first scrambling information, the carrier used for transmitting
the second-type information is a first carrier; or if the
scrambling information is second scrambling information, the
carrier used for transmitting the second-type information is a
second carrier.
[0097] With reference to any one of the foregoing possible
implementation manners, in a tenth possible implementation manner
of the sixth aspect, the scrambling information set includes: at
least two predetermined sequences or at least two different
C-RNTIs.
[0098] With reference to any one of the foregoing possible
implementation manners, in an eleventh possible implementation
manner of the sixth aspect, if the scrambling information set
includes at least two different C-RNTIs, the transceiver is further
configured to send the at least two different C-RNTIs to the user
equipment.
[0099] With reference to any one of the foregoing possible
implementation manners, in a twelfth possible implementation manner
of the sixth aspect, there is a correspondence between a number of
a CCE in which the DCI is located and the carrier used for
transmitting the second-type information.
[0100] With reference to any one of the foregoing possible
implementation manners, in a thirteenth possible implementation
manner of the sixth aspect, that there is a correspondence between
a number of a CCE in which the DCI is located and the carrier used
for transmitting the second-type information includes that: if the
number of the CCE in which the DCI is located belongs to a first
number set, the carrier used for transmitting the second-type
information is a first carrier; or if the number of the CCE in
which the DCI is located belongs to a second number set, the
carrier used for transmitting the second-type information is a
second carrier.
[0101] With reference to any one of the foregoing possible
implementation manners, in a fourteenth possible implementation
manner of the sixth aspect, the transceiver is further configured
to: before sending the first information to the user equipment,
send, to the user equipment, a message used for indicating that the
base station has a full-duplex capability; and receive a first
message sent by the user equipment, where the first message is used
for indicating that the user equipment can receive uplink data and
downlink data on a carrier.
[0102] By using the embodiments of the present invention, if UE has
a duplex capability, the UE determines, according to a first
message sent by a base station, a carrier to be used, and
therefore, can effectively receive or send information.
BRIEF DESCRIPTION OF DRAWINGS
[0103] FIG. 1 is a flowchart of a carrier indication method
according to an embodiment of the present invention;
[0104] FIG. 2 is a flowchart of another carrier indication method
according to an embodiment of the present invention;
[0105] FIG. 3 is a flowchart of still another carrier indication
method according to an embodiment of the present invention;
[0106] FIG. 4 is a schematic diagram of a subframe pattern
according to an embodiment of the present invention;
[0107] FIG. 5 is a schematic diagram of another subframe pattern
according to an embodiment of the present invention;
[0108] FIG. 6 is a structural block diagram of user equipment
according to an embodiment of the present invention;
[0109] FIG. 7 is a structural block diagram of another user
equipment according to an embodiment of the present invention;
[0110] FIG. 8 is a structural block diagram of a base station
according to an embodiment of the present invention; and
[0111] FIG. 9 is a structural block diagram of another base station
according to an embodiment of the present invention.
DESCRIPTION OF EMBODIMENTS
[0112] The following clearly describes the technical solutions in
the embodiments of the present invention with reference to the
accompanying drawings in the embodiments of the present invention.
Apparently, the described embodiments are merely a part rather than
all of the embodiments of the present invention. All other
embodiments obtained by a person of ordinary skill in the art based
on the embodiments of the present invention without creative
efforts shall fall within the protection scope of the present
invention. It should be noted that, in case of no contradiction,
the embodiments of the present invention and features in the
embodiments may be combined with each other.
[0113] A base station described in the embodiments of the present
invention may include an evolved Node B (eNB for short), an access
point, a relay station, and another device that may be used for
access.
[0114] In the embodiments of the present invention, a frequency
band is symmetrical, and the base station (for example, the eNB) is
full-duplex. UE in the embodiments of the present invention
includes Type II UE, which may send uplink data or receive downlink
data on an uplink carrier, and may receive downlink data or send
uplink data on a downlink carrier, but cannot receive and send data
simultaneously on an uplink carrier (or a downlink carrier); and
Type III UE, which is a full-duplex UE, that is, UE that may
receive and send data simultaneously on an uplink carrier (or a
downlink carrier). The foregoing two UEs have a duplex capability.
The UE in the embodiments of the present invention can flexibly use
a spectrum, and therefore, can improve a spectrum utilization
rate.
[0115] An embodiment of the present invention provides a carrier
indication method, where the method may be used to indicate a
carrier that is to be used by UE having a duplex capability. As
shown in FIG. 1, the method includes the following steps:
[0116] Step 101: UE receives first information sent by a base
station.
[0117] Step 102: If the UE is capable of transmitting uplink data
and downlink data on a carrier, the UE determines, according to the
first information, a carrier used for transmitting first-type
information.
[0118] Step 103: The UE transmits the first-type information on the
determined carrier, where the first-type information includes at
least one of the following: uplink data, downlink data, and
scheduling information.
[0119] In a related technology, if UE has a duplex capability, that
is, the UE is capable of transmitting uplink data and downlink data
on a carrier, the UE needs to learn on which carrier the UE is to
transmit information; otherwise, the UE cannot normally transmit
information. In this embodiment, the UE determines, according to
the first information sent by the base station, the carrier used
for transmitting information, and therefore, can normally transmit
information.
[0120] Preferably, the determining, by the UE according to the
first information, a carrier used for transmitting first-type
information may include: determining, by the UE according to a
correspondence between the first information and the carrier used
for transmitting the first-type information, the carrier used for
transmitting the first-type information. The correspondence may be
a one-to-one correspondence, may be a one-to-many correspondence,
may be a many-to-one correspondence, or may be a many-to-many
correspondence. The correspondence may be implemented by using a
correspondence table, or may be implemented by using a
correspondence expression or in another manner.
[0121] An embodiment of the present invention provides a carrier
indication method, where the method may be used to indicate a
carrier that is to be used by UE having a duplex capability. As
shown in FIG. 2, the method includes the following steps:
[0122] Step 201: In a case in which UE is capable of transmitting
uplink data and downlink data on a carrier, a base station
determines a carrier used for transmitting first-type information
by the user equipment, where the first-type information includes at
least one of the following: uplink data, downlink data, and
scheduling information.
[0123] Step 202: The base station sends first information to the
UE, where there is a correspondence between the first information
and the carrier used for transmitting the first-type information,
so that in the case in which the UE is capable of transmitting
uplink data and downlink data on a carrier, the UE determines,
according to the first information, the carrier used for
transmitting the first-type information.
[0124] Step 203: The base station transmits, on the carrier, the
first-type information corresponding to the UE, where the
first-type information includes at least one of the following:
uplink data, downlink data, and scheduling information.
[0125] In a related technology, if UE has a duplex capability, that
is, the UE is capable of transmitting uplink data and downlink data
on a carrier, the UE needs to learn on which carrier the UE is to
transmit information; otherwise, the UE cannot normally transmit
information. In this embodiment, the UE determines, according to
the first information sent by the base station, the carrier used
for transmitting information, and therefore, can normally transmit
information.
[0126] Preferably, before step 202, the base station generates the
first information according to the correspondence between the first
information and the carrier used for transmitting the first-type
information. The correspondence may be a one-to-one correspondence,
may be a one-to-many correspondence, may be a many-to-one
correspondence, or may be a many-to-many correspondence. The
correspondence may be implemented by using a correspondence table,
or may be implemented by using a correspondence expression or in
another manner.
[0127] An embodiment of the present invention provides a carrier
indication method, where the method may be used to indicate a
carrier that is to be used by UE having a duplex capability. As
shown in FIG. 3, the method includes the following steps:
[0128] Step 301: A base station sends first information to UE.
[0129] Step 302: If the UE is capable of transmitting uplink data
and downlink data on a carrier, the UE and the base station
determine, according to the first information, a carrier used for
transmitting first-type information.
[0130] Step 303: The UE and the base station transmit the
first-type information on the determined carrier, where the
first-type information includes at least one of the following:
uplink data, downlink data, and scheduling information.
[0131] In a related technology, if UE has a duplex capability, that
is, the UE is capable of transmitting uplink data and downlink data
on a carrier, the UE needs to learn on which carrier the UE is to
transmit information; otherwise, the UE cannot normally transmit
information. In this embodiment, the UE determines, according to
the first information sent by the base station, the carrier used
for transmitting information, and therefore, can normally transmit
information.
[0132] Preferably, before step 301, in a case in which the UE is
capable of transmitting uplink data and downlink data on a carrier,
the base station determines the carrier used for transmitting the
first-type information by the user equipment, where the first-type
information includes at least one of the following: uplink data,
downlink data, and scheduling information.
[0133] Preferably, the determining, by the UE according to the
first information, a carrier used for transmitting first-type
information may include: determining, by the UE according to a
correspondence between the first information and the carrier used
for transmitting the first-type information, the carrier used for
transmitting the first-type information. The correspondence may be
a one-to-one correspondence, may be a one-to-many correspondence,
may be a many-to-one correspondence, or may be a many-to-many
correspondence. The correspondence may be implemented by using a
correspondence table, or may be implemented by using a
correspondence expression or in another manner.
[0134] In an exemplary implementation manner of this embodiment of
the present invention, the determining, by the UE according to a
correspondence between the first information and the carrier used
for transmitting the first-type information, the carrier used for
transmitting the first-type information may include: determining,
by the UE, whether the first information belongs to a first
predetermined set or a second predetermined set; if the first
information belongs to the first predetermined set, determining, by
the UE, to transmit the first-type information on a first carrier;
or if the first information belongs to a second set, determining,
by the UE, to transmit the first-type information on a second
carrier. The first carrier and the second carrier each may include
multiple carriers. In this embodiment, the first predetermined set
may be a numerical value, may be a numerical value range, or may be
a set of some numerical values. By using this embodiment, a carrier
to be used by the UE can be determined provided that a relationship
between the first information and a predetermined set is
determined.
[0135] In another exemplary implementation manner of this
embodiment of the present invention, the determining, by the UE
according to a correspondence between the first information and the
carrier used for transmitting the first-type information, the
carrier used for transmitting the first-type information includes:
determining, by the UE, a corresponding subframe pattern according
to the first information; and determining, by the UE according to
the subframe pattern, a carrier on which the first-type information
is transmitted in each subframe. Preferably, the subframe pattern
may be included in the first information. The subframe pattern may
be a proportion, representing a proportion of a subframe used for
transmitting information of a same type (for example, at least one
of uplink data, downlink data, and scheduling information) on each
of different carriers. By using this embodiment, a carrier to be
used by the UE can be determined according to a subframe pattern
only.
[0136] Optionally, the first information includes one of the
following: a predetermined value and UE-specific information.
Preferably, the UE-specific information includes one of the
following: a cell radio network temporary identifier (C-RNTI for
short) and a temporary cell radio network temporary identifier
(TC-RNTI for short) that correspond to the UE. This embodiment has
an advantage of simple implementation.
[0137] In still another exemplary implementation manner of this
embodiment of the present invention, the determining, by the UE
according to a correspondence between the first information and the
carrier used for transmitting the first-type information, the
carrier used for transmitting the first-type information includes:
the first information being corresponding to at least one of the
following: a subframe pattern of a first carrier and a subframe
pattern of a second carrier; and determining, by the UE according
to the subframe pattern of the first carrier and/or the subframe
pattern of the second carrier, a carrier on which the first-type
information is transmitted in each subframe. By using this
embodiment, a carrier to be used by the UE can be determined
according to a subframe pattern of each carrier only.
[0138] Preferably, the transmitting, by the UE, the first-type
information on the determined carrier includes: transmitting
downlink control information (DCI for short) on the determined
carrier, for example, the base station sends the DCI to the UE on
the determined carrier, and/or, the UE receives the DCI on the
determined carrier; and determining, according to the DCI, a
carrier used for transmitting second-type information, where the
second-type information includes: uplink data and/or downlink data.
In this embodiment, a carrier used for transmitting scheduling
information (for example, DCI) is determined according to the
foregoing determining method, and a carrier used for transmitting
uplink data and/or downlink data is determined according to the
transmitted DCI, thereby determining the carrier to be used by the
UE.
[0139] Optionally, the determining, by the UE according to the DCI,
a carrier used for transmitting second-type information may be
implemented in the following manner: the DCI including: first
indication information used for indicating that uplink transmission
or downlink transmission is to be performed and second indication
information used for indicating a carrier, and determining, by the
UE according to the first indication information and the second
indication information, the carrier used for transmitting the
second-type information. In this embodiment, the DCI is extended,
so that the DCI includes the second indication information used for
indicating the carrier; therefore, the UE can conveniently
determine, according to the second indication information, the
carrier used for transmitting the second-type information.
Preferably, the determining, by the UE according to the first
indication information and the second indication information, the
carrier used for transmitting the second-type information includes:
if the first indication information indicates that uplink
transmission is to be performed, transmitting, by the UE, uplink
data on the carrier indicated by the second indication information;
or if the first indication information indicates that downlink
transmission is to be performed, transmitting, by the UE, downlink
data on the carrier indicated by the second indication
information.
[0140] Preferably, the determining, by the UE according to the DCI,
a carrier used for transmitting second-type information may further
be implemented in the following manner: descrambling the DCI by
using descrambling information in a descrambling information set;
and if the DCI is successfully descrambled by using first
descrambling information, determining to transmit the second-type
information on the first carrier; or if the DCI is successfully
descrambled by using second descrambling information, determining
to transmit the second-type information on the second carrier.
Preferably, the descrambling information set may include: at least
two predetermined sequences or at least two different C-RNTIs. The
descrambling information in the descrambling information set is at
least two predetermined sequences or at least two different
C-RNTIs. The descrambling information is information used for
descrambling the DCI. In this embodiment, the descrambling
information of the DCI is associated with a carrier to be used by
the UE, so that the carrier to be used by the UE can be determined
without changing specific content of the DCI or changing an
existing procedure. Accordingly, before the UE determines,
according to the DCI, the carrier used for transmitting the
second-type information, on a base station side, the base station
scrambles the DCI by using scrambling information in a scrambling
information set, where there is a correspondence between the
scrambling information and the carrier used for transmitting the
second-type information, for example, if the scrambling information
is first scrambling information, the second-type information is
transmitted on a first carrier; or if the scrambling information is
second scrambling information, the second-type information is
transmitted on a second carrier. The first scrambling information
corresponds to the first descrambling information, and the second
scrambling information corresponds to the second descrambling
information.
[0141] Preferably, if the descrambling information set and/or the
scrambling information set includes at least two different C-RNTIs,
before the DCI is descrambled, the base station allocates at least
two different C-RNTIs to the UE, and sends the at least two
different C-RNTIs to the UE.
[0142] Optionally, the determining, according to the DCI, a carrier
used for transmitting the second-type information may further be
implemented in the following manner: determining, according to a
correspondence between a number of a CCE in which the DCI is
located and the carrier used for transmitting the second-type
information, the carrier used for transmitting the second-type
information. The correspondence may be a one-to-one correspondence,
may be a one-to-many correspondence, may be a many-to-one
correspondence, or may be a many-to-many correspondence. The
correspondence may be implemented by using a correspondence table,
or may be implemented by using a correspondence expression or in
another manner.
[0143] Optionally, the determining, according to a correspondence
between a number of a CCE in which the DCI is located and the
carrier used for transmitting the second-type information, the
carrier used for transmitting the second-type information includes:
if the number of the CCE in which the DCI is located belongs to a
first number set, determining to transmit the second-type
information on the first carrier; or if the number of the CCE in
which the DCI is located belongs to a second number set,
determining to transmit the second-type information on the second
carrier.
[0144] Preferably, before the sending, by a base station, first
information to UE, the method further includes:
[0145] Step 304: The base station sends, to the UE, a message used
for indicating that the base station has a full-duplex
capability.
[0146] Step 305: The UE sends a first message to the base station,
where the first message is used for indicating that the UE can
receive uplink data and downlink data on a carrier. By using this
embodiment, the base station can determine that the UE has a duplex
capability.
Embodiment 1
[0147] This embodiment provides a carrier indication method, where
the method may be used to indicate a carrier that is to be used by
UE having a duplex capability. The method includes the following
steps:
[0148] Step 1: An eNB notifies, by using higher layer signaling, UE
that the eNB has a full-duplex capability.
[0149] Step 2: After accessing the eNB randomly and learning that
the eNB has a full-duplex capability, the UE notifies the eNB that
the UE has a duplex capability, for example, notifies the eNB that
the UE is Type II UE or Type III UE.
[0150] Step 3: The eNB sends, to the UE, information indicating
which carrier is to be used by the UE. The indication method may
include any one of the following:
[0151] Manner 1: The eNB indicates, to the UE by using higher layer
signaling, on which carrier the UE should receive scheduling
information, receive downlink data, and/or send uplink data. The
following gives exemplary description.
Example 1
[0152] When the eNB sends "1", it represents that the scheduling
information is received on a carrier N, and when the eNB sends "0",
it represents that the scheduling information is received on a
carrier M; therefore, after receiving "1", the UE may receive the
scheduling information on the carrier N; otherwise, the UE receives
the scheduling information on the carrier M. On which carrier the
UE is scheduled to send uplink data or receive downlink data is not
limited, for example, it may be specified that downlink data is
received on a carrier on which the scheduling information is
received, and uplink data is sent on another carrier.
Example 2
[0153] When the eNB sends "1", it may represent that downlink data
is received on a carrier N, and when the eNB sends "0", it
represents that downlink data is received on a carrier M; in this
case, on which carrier the UE receives the scheduling information
and on which carrier new UE is scheduled to send uplink data are
not limited, for example, it may be specified that the scheduling
information is received on the carrier M, "1" may not only
represent that the downlink data is received on the carrier N, but
also represent that the uplink data is sent on the carrier M, and
"0" may not only represent that the downlink data is received on
the carrier M, but also represent that the uplink data is sent on
the carrier N.
Example 3
[0154] When the eNB sends "1", it may represent that uplink data is
sent on a carrier M, and when the eNB sends "0", it represents that
uplink data is sent on a carrier N; in this case, on which carrier
the UE receives the scheduling information and the downlink data is
not limited, for example, "1" may not only represent that the
uplink data is sent on the carrier M, but also represent that the
scheduling information and the downlink data are received on the
carrier N, and "0" may not only represent that the uplink data is
sent on the carrier N, but also represent that the scheduling
information and the downlink data are received on the carrier
M.
[0155] It should be noted that, the foregoing example is only
exemplary description of this embodiment of the present invention,
and in a practical application, explanations of "1" and "0" may
change.
[0156] Manner 2: Indicate, to the UE by using an implicit method,
on which carrier the UE should receive scheduling information,
receive downlink data, and/or send uplink data. For example, a
carrier to be used by the UE may be found through mapping by using
a C-RNTI or a TC-RNTI. If the C-RNTI or the TC-RNTI is a value (for
example, an even number, or greater than/less than a value), the UE
receives the scheduling information on a carrier N; otherwise, the
UE receives the scheduling information on a carrier M. In this
case, the UE may determine, according to its own C-RNTI or TC-RNTI,
on which carrier the UE is to receive the scheduling information,
receive the downlink data, and/or send the uplink data. When the
C-RNTI or the TC-RNTI is used to find, through mapping, a carrier
to be used by the UE, an execution sequence of step 3 and step 2 is
not limited, for example, step 3 may be executed first, and then
step 2 is executed.
[0157] Manner 3: The eNB sends a subframe pattern (pattern) to the
UE, where the subframe pattern is used for notifying the UE of a
pattern to receive the scheduling information, receive the downlink
data, and/or send the uplink data, and the UE receives the
scheduling information, receives the scheduling information and the
downlink data, and/or sends the uplink data on a carrier specified
by the subframe pattern. The following describes Manner 3 by using
an example. The eNB notifies the UE that the subframe pattern is
6:4, where this subframe pattern may represent a subframe pattern
shown in FIG. 4, that is, in a radio frame, for the first six
subframes, the scheduling information is received on the carrier M,
and for the last four subframes, the scheduling information is
received on the carrier N. It should be noted that, the subframe
pattern is UE specific, and in a cell, subframe patterns of
different UEs may be different. For UE supporting carrier
aggregation, blank subframes in FIG. 4 may also be used to schedule
downlink data, for example, in a subframe n, the UE may also be
scheduled to receive the downlink data on the carrier N. If a
capability of non-full-duplex UE (type II UE) is that the UE can
only receive downlink scheduling information and downlink data on
one carrier, and send uplink data on another carrier, in FIG. 4,
when the UE receives an uplink grant (UL grant) in the subframe n,
the UE may send the uplink data on the carrier N in a subframe
(n+4). However, according to the pattern shown in FIG. 4, the
subframe (n+4) on the carrier N needs to be used for receiving
downlink scheduling information, and because the non-full-duplex UE
cannot send and receive data in a same subframe on a same carrier
simultaneously, a method may be specified, where for the subframe n
to a subframe (n+3), after receiving the UL grant, the UE sends the
uplink data always on the carrier M, thereby avoiding that new
non-full-duplex UE performs sending and receiving simultaneously.
For a non-full-duplex UE, when the non-full-duplex UE switches from
a carrier used for receiving downlink scheduling information to
another carrier to receive downlink scheduling information, a
switching time may be needed, and this factor may be considered
during system design, for example, in the subframe (n+3) in FIG. 4,
the eNB may avoid scheduling downlink data for the UE.
[0158] Manner 4: For new UE supporting carrier aggregation, the eNB
may also notify a subframe pattern (for example, a subframe ratio)
for each carrier, where the subframe pattern represents in which
subframes on each carrier, scheduling information is to be
received, downlink data is to be received, and/or uplink data is to
be sent. The subframe pattern is UE specific, and in a cell,
subframe patterns of different UEs may be different. The following
describes Manner 4 by using an example.
[0159] In FIG. 5, D represents downlink, and U represents uplink.
The eNB notifies the UE of subframe ratios on two carriers. For the
carrier M, the notified subframe ratio is 4:1, and for the carrier
N, the notified subframe ratio is 3:2, where the subframe ratios
represent that: in five subframes, in the first three subframes,
the two carriers both are used for receiving downlink scheduling
information and downlink data, in the fourth subframe, the carrier
M is used for receiving downlink scheduling information and
downlink data, and the carrier N is used for sending uplink data;
in the fifth subframe, the two carriers both are used for sending
uplink data.
[0160] It should be noted that, this embodiment uses only two
carriers as an example for description, but is not limited to a
case in which there are two carriers. The method in this embodiment
may also be extended to a case in which there are more than two
carriers.
Embodiment 2
[0161] This embodiment of the present invention further provides a
carrier indication method, where the method may be used to indicate
a carrier that is to be used by UE having a duplex capability.
[0162] When an eNB schedules UE having a duplex capability, because
the UE is capable of transmitting uplink data and downlink data on
a carrier, during scheduling, on which carrier the UE is scheduled
to send and/or receive data needs to be indicated to the UE. The
following introduces a method for indicating, to the UE during
scheduling of the UE, on which carrier transmission is to be
performed.
[0163] An indication field indication is added to DCI, for example,
if the DCI is a DL grant, when the indication field is "1", it
represents that the UE receives downlink data on a carrier N, or
when the indication field is "0", it represents that the UE
receives downlink data on a carrier M; if the DCI is an UL grant,
when the indication field is "1", it represents that the UE sends
uplink data on a carrier M, or when the indication field is "0", it
represents that the UE receives downlink data on a carrier N. A
resource allocation field in the DCI may also be extended by one
bit, and all resource blocks (RB for short) of two carriers are
allocated together, for example, each of the two carriers has 100
RBs, the two carriers have 200 RBs in total, and the 200 RBs are
put together for allocation and are numbered from 0 to 199.
[0164] A cyclic redundancy check (CRC for short) of DCI of a
scheduled UE is scrambled by using different sequences, where
different scrambling sequences represent that information is
sent/received on different carriers. For example, scrambling
performed by using a sequence {a} represents that information is
sent and/or received on a carrier M, and scrambling performed by
using a sequence {b} represents that information is sent and/or
received on a carrier N. When receiving the scrambled CRC of the
DCI, the UE can determine, by determining a scrambling sequence, on
which carrier information should be sent and/or received.
[0165] A base station allocates at least two C-RNTIs to the UE,
where different C-RNTIs represent that scheduling is performed on
different carriers. To ensure that a quantity of times of blind
detection by the UE is not increased, same search space may be
shared for the different C-RNTIs. For example, two C-RNTIs are
allocated to the UE, if the CRC, sent by the eNB to the UE, of the
DCI used to perform uplink scheduling is scrambled by using a first
C-RNTI, it represents that the UE is to send the uplink data on the
carrier M; if the CRC, sent by the eNB to the UE, of the DCI used
to perform uplink scheduling is scrambled by using a second C-RNTI,
it represents that the UE is to send the uplink data on the carrier
N.
[0166] A control channel element (CCE for short) of a physical
downlink control channel (PDCCH for short) of a scheduled UE
corresponds to different scheduling carriers. For example, if a
number of a first CCE of the PDCCH of the scheduled UE is less than
a half of a total quantity of CCEs, it represents that scheduling
is performed on the carrier M; otherwise, scheduling is performed
on the carrier N.
[0167] It should be noted that, this embodiment uses only two
carriers as an example for description, but is not limited to a
case in which there are two carriers. The method in this embodiment
may also be extended to a case in which there are more than two
carriers.
[0168] Embodiment 1 and Embodiment 2 may be combined and used. For
example, a subframe pattern in Embodiment 1 is allocated to UE, so
that the UE can use a corresponding carrier according to the
subframe pattern to receive scheduling information, and then, data
is scheduled on different carriers by using the method in
Embodiment 2.
[0169] An embodiment of the present invention provides user
equipment, where the user equipment may implement the foregoing
method embodiment. Therefore, a feature of the user equipment in
the foregoing method embodiment may be combined with this
embodiment. FIG. 6 is a structural block diagram of the user
equipment according to this embodiment of the present invention. As
shown in FIG. 6, the user equipment includes: a transceiver unit 60
and a processing unit 62, where the transceiver unit 60 is
configured to receive first information sent by a base station; the
processing unit 62 is configured to: in a case in which the user
equipment is capable of transmitting uplink data and downlink data
on a carrier, determine, according to the first information, a
carrier used for transmitting first-type information; and the
transceiver unit 60 is further configured to transmit the
first-type information on the determined carrier, where the
first-type information includes at least one of the following:
uplink data, downlink data, and scheduling information.
[0170] Preferably, the processing unit 62 is configured to
determine, in the following manner according to the first
information, the carrier used for transmitting the first-type
information: determining, by the processing unit 62 according to a
correspondence between the first information and the carrier used
for transmitting the first-type information, the carrier used for
transmitting the first-type information.
[0171] Optionally, the processing unit 62 is configured to
determine, in the following manner according to the correspondence
between the first information and the carrier used for transmitting
the first-type information, the carrier used for transmitting the
first-type information: determining, by the processing unit 62,
whether the first information belongs to a first predetermined set
or a second predetermined set; in a case in which it is determined
that the first information belongs to the first predetermined set,
determining, by the processing unit 62, to transmit the first-type
information on a first carrier; or in a case in which it is
determined that the first information belongs to the second
predetermined set, determining, by the processing unit 62, to
transmit the first-type information on a second carrier.
[0172] In an exemplary implementation manner of this embodiment of
the present invention, the processing unit 62 is configured to
determine, in the following manner according to the correspondence
between the first information and the carrier used for transmitting
the first-type information, the carrier used for transmitting the
first-type information: determining, by the processing unit 62
according to the first information, a subframe pattern
corresponding to the first information; and determining, by the
processing unit 62 according to the subframe pattern, a carrier on
which the first-type information is transmitted in each
subframe.
[0173] Optionally, the first information includes the subframe
pattern.
[0174] Preferably, the first information includes at least one of
the following: a predetermined value and user equipment-specific
information.
[0175] Optionally, the user equipment-specific information includes
at least one of the following: a C-RNTI and a TC-RNTI.
[0176] Optionally, the processing unit 62 is configured to
determine, in the following manner according to the correspondence
between the first information and the carrier used for transmitting
the first-type information, the carrier used for transmitting the
first-type information: the first information being corresponding
to at least one of the following: a subframe pattern of a first
carrier and a subframe pattern of a second carrier; and
determining, by the processing unit 62 according to the subframe
pattern of the first carrier and/or the subframe pattern of the
second carrier, a carrier on which the first-type information is
transmitted in each subframe.
[0177] Preferably, the transceiver unit 60 is configured to
transmit the first-type information on the determined carrier in
the following manner: receiving, by the transceiver unit 60,
downlink control information DCI on the determined carrier; and the
processing unit 62 is further configured to: after the transceiver
unit 60 receives the DCI on the determined carrier, determine,
according to the DCI, a carrier used for transmitting second-type
information, where the second-type information includes: uplink
data and/or downlink data.
[0178] In another exemplary implementation manner of this
embodiment of the present invention, the processing unit 62 is
configured to determine, in the following manner according to the
DCI, the carrier used for transmitting the second-type information:
the DCI including: first indication information used for indicating
that uplink transmission or downlink transmission is to be
performed, and second indication information used for indicating a
carrier, and determining, by the processing unit 62 according to
the first indication information and the second indication
information, the carrier used for transmitting the second-type
information.
[0179] Optionally, the processing unit 62 is configured to
determine, in the following manner according to the DCI, the
carrier used for transmitting the second-type information:
descrambling, by the processing unit 62, the DCI by using
descrambling information in a descrambling information set; and in
a case in which the DCI is successfully descrambled by using first
descrambling information, determining, by the processing unit 62,
to transmit the second-type information on the first carrier; or in
a case in which the DCI is successfully descrambled by using second
descrambling information, determining, by the processing unit 62,
to transmit the second-type information on the second carrier.
[0180] Preferably, the descrambling information set includes: at
least two predetermined sequences or at least two different
C-RNTIs.
[0181] Optionally, the transceiver unit 60 is further configured
to: in a case in which the descrambling information set includes at
least two different C-RNTIs, before the DCI is descrambled, receive
the at least two different C-RNTIs allocated by the base
station.
[0182] Preferably, the processing unit 62 is configured to
determine, in the following manner according to the DCI, the
carrier used for transmitting the second-type information:
determining, by the processing unit 62 according to a
correspondence between a number of a CCE in which the DCI is
located and the carrier used for transmitting the second-type
information, the carrier used for transmitting the second-type
information.
[0183] Optionally, the processing unit 62 is configured to
determine, in the following manner according to the correspondence
between the number of the CCE in which the DCI is located and the
carrier used for transmitting the second-type information, the
carrier used for transmitting the second-type information: in a
case in which the number of the CCE in which the DCI is located
belongs to a first number set, determining, by the processing unit
62, to transmit the second-type information on the first carrier;
or in a case in which the number of the CCE in which the DCI is
located belongs to a second number set, determining, by the
processing unit 62, to transmit the second-type information on the
second carrier.
[0184] Preferably, the transceiver unit 60 is further configured
to: before the user equipment receives the first information sent
by the base station, receive a message sent by the base station and
used for indicating that the base station has a full-duplex
capability, and send a first message to the base station, where the
first message is used for indicating that the user equipment can
receive uplink data and downlink data on a carrier.
[0185] An embodiment of the present invention provides another user
equipment, where the user equipment may implement the foregoing
method embodiment. Therefore, a feature of the user equipment in
the foregoing method embodiment may be combined with this
embodiment. FIG. 7 is a structural block diagram of the another
user equipment according to this embodiment of the present
invention. As shown in FIG. 7, the user equipment includes: a
transceiver 70 and a processor 72. The transceiver 70 may be
configured to implement functions of the transceiver unit 60 in the
embodiment shown in FIG. 6, and the processor 72 may be configured
to implement functions of the processing unit 62 in the embodiment
shown in FIG. 6.
[0186] An embodiment of the present invention provides a base
station, where the base station may implement the foregoing method
embodiment. Therefore, a feature of the base station in the
foregoing method embodiment may be combined with this embodiment.
FIG. 8 is a structural block diagram of the base station according
to this embodiment of the present invention. As shown in FIG. 8,
the base station includes: a transceiver unit 80 and a processing
unit 82. The processing unit 82 is configured to: in a case in
which user equipment is capable of transmitting uplink data and
downlink data on a carrier, determine a carrier used for
transmitting first-type information by the user equipment, where
the first-type information includes at least one of the following:
uplink data, downlink data, and scheduling information; the
transceiver unit 80 is configured to send first information to the
user equipment, where there is a correspondence between the first
information and the carrier used for transmitting the first-type
information; and the transceiver unit 80 is further configured to
transmit the first-type information on the carrier.
[0187] Preferably, that there is a correspondence between the first
information and the carrier used for transmitting the first-type
information includes that: if the first information belongs to a
first predetermined set, the carrier used for transmitting the
first-type information is a first carrier; or if the first
information belongs to a second predetermined set, the carrier used
for transmitting the first-type information is a second
carrier.
[0188] Preferably, that there is a correspondence between the first
information and the carrier used for transmitting the first-type
information includes that: the first information corresponds to a
subframe pattern, and the subframe pattern corresponds to a carrier
on which the first-type information is transmitted in a
subframe.
[0189] Optionally, the first information includes the subframe
pattern.
[0190] Optionally, the first information includes at least one of
the following: a predetermined value and user equipment-specific
information.
[0191] Preferably, the user equipment-specific information includes
at least one of the following: a cell radio network temporary
identifier C-RNTI and a temporary cell radio network temporary
identifier TC-RNTI that correspond to the user equipment.
[0192] Preferably, that there is a correspondence between the first
information and the carrier used for transmitting the first-type
information includes that: the first information corresponds to at
least one of the following: a subframe pattern of a first carrier
and a subframe pattern of a second carrier; and the subframe
pattern of the first carrier and/or the subframe pattern of the
second carrier corresponds to a carrier on which the first-type
information is transmitted in the subframe.
[0193] Optionally, the transceiver unit 80 is configured to
transmit the first-type information on the carrier in the following
manner: sending downlink control information DCI to the user
equipment on the carrier determined by the base station and used
for transmitting the first-type information, where the DCI is used
by the user equipment to determine, according to the DCI, a carrier
used for transmitting second-type information, and the second-type
information includes: uplink data and/or downlink data.
[0194] Optionally, the DCI includes: first indication information
used for indicating that uplink transmission or downlink
transmission is to be performed, and second indication information
used for indicating a carrier.
[0195] Preferably, the processing unit 82 is further configured to:
before the transceiver unit 80 sends the downlink control
information DCI to the user equipment, scramble the DCI by using
scrambling information in a scrambling information set, where if
the scrambling information is first scrambling information, the
carrier used for transmitting the second-type information is a
first carrier; or if the scrambling information is second
scrambling information, the carrier used for transmitting the
second-type information is a second carrier.
[0196] Preferably, the scrambling information set includes: at
least two predetermined sequences or at least two different
C-RNTIs.
[0197] Optionally, if the scrambling information set includes at
least two different C-RNTIs, the transceiver unit 80 is further
configured to send the at least two different C-RNTIs to the user
equipment.
[0198] Preferably, there is a correspondence between a number of a
CCE in which the DCI is located and a carrier used for transmitting
second-type information.
[0199] In an exemplary implementation manner of this embodiment of
the present invention, that there is a correspondence between a
number of a CCE in which the DCI is located and the carrier used
for transmitting the second-type information includes that: if the
number of the CCE in which the DCI is located belongs to a first
number set, the carrier used for transmitting the second-type
information is a first carrier; or if the number of the CCE in
which the DCI is located belongs to a second number set, the
carrier used for transmitting the second-type information is a
second carrier.
[0200] In another exemplary implementation manner of this
embodiment of the present invention, the transceiver unit 80 is
further configured to: before sending the first information to the
user equipment, send, to the user equipment, a message used for
indicating that the base station has a full-duplex capability; and
receive a first message sent by the user equipment, where the first
message is used for indicating that the user equipment can receive
uplink data and downlink data on a carrier.
[0201] An embodiment of the present invention provides another base
station, where the base station may implement the foregoing method
embodiment. Therefore, a feature of the base station in the
foregoing method embodiment may be combined with this embodiment.
FIG. 9 is a structural block diagram of the another base station
according to this embodiment of the present invention. As shown in
FIG. 9, the base station includes: a transceiver 90 and a processor
92. The transceiver 90 may be configured to implement functions of
the transceiver unit 80 in the embodiment shown in FIG. 8, and the
processor 92 may be configured to implement functions of the
processing unit 82 in the embodiment shown in FIG. 8.
[0202] The processor in the foregoing embodiments of the present
invention may be a baseband processor, may be an integrated circuit
chip having a signal processing capability, or may be a hardware
processor such as a central processing unit (CPU for short). In an
implementation process, steps of the foregoing method may be
implemented by using an integrated logic circuit of hardware of the
processor or by using an instruction in a software form. The
instructions may be implemented and controlled in a manner of
cooperation by using the processor, to perform the method disclosed
in the embodiments of the present invention. The processor may be a
general purpose processor, a digital signal processor (DSP for
short), an application specific integrated circuit (ASIC for
short), a field programmable gate array (FPGA for short) or another
programmable logic device, a discrete gate or a transistor logic
device, or a discrete hardware component, and may implement or
execute the methods, steps, and logic block diagrams that are
disclosed in the embodiments of the present invention. A general
purpose processor may be a microprocessor or the processor may also
be any conventional processor, decoder, and the like. Steps of the
methods disclosed with reference to the embodiments of the present
invention may be directly executed and accomplished by means of a
hardware processor, or may be executed and accomplished by using a
combination of hardware and software modules in the processor. The
software module may be located in a mature storage medium in the
field, such as a random access memory, a flash memory, a read-only
memory, a programmable read-only memory, an electrically-erasable
programmable memory or a register.
[0203] With descriptions of the foregoing embodiments, a person
skilled in the art may clearly understand that the present
invention may be implemented by hardware, firmware or a combination
thereof. When the present invention is implemented by software, the
foregoing functions may be stored in a computer-readable medium or
transmitted as one or more instructions or code in the
computer-readable medium. The computer-readable medium includes a
computer storage medium and a communications medium, where the
communications medium includes any medium that enables a computer
program to be transmitted from one place to another. The storage
medium may be any available medium accessible to a computer.
Examples of the computer-readable medium include, but are not
limited to: a random access memory (RAM for short), a read-only
memory (ROM for short), an electrically erasable programmable
read-only memory (EEPROM for short), a compact disc read-only
memory (CD-ROM for short) or other optical disc storage, a disk
storage medium or another disk storage device, or any other medium
that can be used to carry or store expected program code in a
command or data structure form and can be accessed by a computer.
In addition, any connection may be appropriately defined as a
computer-readable medium. For example, if software is transmitted
from a website, a server or another remote source by using a
coaxial cable, an optical fiber/cable, a twisted pair, a digital
subscriber line (DSL for short) or wireless technologies such as
infrared ray, radio and microwave, the coaxial cable, optical
fiber/cable, twisted pair, DSL or wireless technologies such as
infrared ray, radio and microwave are included in fixation of a
medium to which they belong. For example, a disk (Disk) and disc
(disc) used by the present invention includes a compact disc (CD
for short), a laser disc, an optical disc, a digital versatile disc
(DVD for short), a floppy disk and a Blu-ray disc, where the disk
generally copies data by a magnetic means, and the disc copies data
optically by a laser means. The foregoing combination should also
be included in the protection scope of the computer-readable
medium.
[0204] In summary, what is described above is merely exemplary
embodiments of the technical solutions of the present invention,
but is not intended to limit the protection scope of the present
invention. Any modification, equivalent replacement, or improvement
made without departing from the spirit and principle of the present
invention shall fall within the protection scope of the present
invention.
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